Gauge



Sept. 7, 1943. M; MAAG .2,329,067

,4770 mfr Sept. 7, 1943. '.M. MAAc;v A 2,329,067

GAUGE Filed July 2, 1940 2 Sheets-Sheet 2 Max Maa 4,/

A ,47m/wr part pointed out lfiereinafter. A

Patented Sept.A 7, 1943 i...\..

to measure bores and diameters of cylindricalv workpieces. A further object of the invention" consists in the provisitm:` ofl an adjustableV gauge.

of the type aforesaid which permits the?rneavsurj.v ingfunder unvariable conditions the pressure' .by'l which the rgauging elements are pressed ontotne.' workpiece is the same in a given gauge'and equals a,predeterminedgmagnitude.'

other. objects win be in pain ob'vis fl The invention accordingly consists inthe fveaef tures of-construction, combination .of..e1 ,r nents and arrangement of parts-A which -will be eiiemf pliiied in the construction hereinafternsetvforthg andthefscope of the application of which will be indicated inthe appended claims.l

.Inthe drawings: l .1 Shows .in a diagrammaal manner an. adjustableinternal gauge in sectional elevation., Fig. 2 is a front elevation. Y d Fig. 3 is a side elevationthereof. y .i Figs. 4, 5 and 6 illustrate each in an axi nl secf. tion part of a further embodiment of the invention. f

Fig. 7 Vis a face View of the pressbar ofl gauge shown in Fig. `6.

8 illustrates in sectional elevation and; i.

a diagrammatical manner the gauging lmember, and ,its adjusting bar of "an internal gauge.`

, Figs. 9. and 10 show different gauging members with the co-operating setting rods in front view.,

The adjustable internal gauge shown in Figs. 1 to 3 comprises a cylindrical casing I having a bore in which a rod 2 is slidably mounted. The casing I is provided with a head 9 with a conical bore I0 into which projects the conical endpiece 3 of the rod 2. the bore I0. Between the'body of the casing I and the head 9 there is an annular groove I4.`

Three radial slots I2 divide the head in three springy jaws I3. The head 9V may be expanded by pressing the conical end piece 3 of rod 2 into the b'ore I0. In a cross bore 26 of the rod 2 'a pin 28 is fixed, the ends of which project through two slots 21 of the casing I. The rod 2 has an extension 2| which is guided in a disk 24. This disk 24 is held by a setv screw 25 arranged in the Wall of the casing I. Between the shoulder 23 and the said disk v24 a coiled spring 22 is ar- The end piece 3 ts exactly in casingy I is provided with internal screw threads.. Ajcap 'l is slidably and rotatably mounted on" the kcasing `I iand is provided with ay screw threaded bolt'20 secured'i-n the `cap-by a screw `Sand. ahnte.. Theben 2do engages the tnreadsof .the casigli;

LQBy turning the cap I the .latteris movednin aXial. direction and apin y."lfrlxed tolsaid'bolt,Vv `20=is` brought ringtonen/with the face of the exe tensiony 2|.,V The position ofuthe saidv iacewith reference to the casingvI may be read ;off by.

scales Iig-I3 in the well known marinera...

The gauge is used to take iinegmeasurements., The hand of the Workman holding the casingl ,withdraws the Q rod. against the action oftha spring 22. The conical 'endpieceA 3 frees the jaws);` L3- which. owingv to:the elasticity of their groove portions move inwardly.y .n Thehead 9 is inserted; inthe borekof the workpiece I'Land the rod .2; released. The endpiece l3- presses-the jaws.,.I2f.

apart under the action offthe expanding spring'.l

22. `The Ijaws I2, are pressed valwayswith'- the,`

same force on to the inner wall YIt of the Workl piece I1, the-measurements which are normallyg within a few hundredths of an inch are therefore;I

very reliable. f The sleeve lis-nowturned until the feeler B abuts onrthe face of therod extent.; sion-2.I. yThe scales I8, I9 show thel diameter.; of thegbore I6.Y The distancewhich the rodnZ moves while-taking the measure is comparatively:

dis-

very` great and is always a multiple of the tancemoved by the gauging jaws I3.` .In Fig. lV another practical embodiment the invention is shown. ToV theicasing I; atubuv: lar: extension member 3l is screwed, `carryinga headv 34. y The head 34v isscrewed into the cas-.i

ing 3i so that it may-bereplaced `by anotherheads.

with yother dimensions. A number of' angularly and axially spaced gauging bolts 33 are slidably arranged in radial bores of the head 34, the bolts are distributed evenly over the whole head. Each bolt 33 is provided with a lateral groove 36 into which the end of a set screw 31 projects securing'v the bolt inits bore. The inner faces of the bolts 33 are curved as shown in Fig. 9. They rest with the whole face on the cone 3. The rod coml, prises several sections 2, 32 and 2', screwed totions.

va sleeve 50 is slidably mounted on the casing I.

ranged, pressing the conical endpiece 3 into the 55 The sleeve 50 is fixed with the pins 28 to a bushoff.

2v c "p y ing 5I fixed to rod 2 and slidably guided in the slot 21. The scale I 8 is placed on a sleeve 53 which is fastened to the casing I. On a tubular extension 590i the casing I a sleeve 55 is mounted which is rotatably and axially displaceable. An annular member 54 carrying the scale I9 is rotatably adjustable on the sleeve 55 and may be clamped in any rotative position thereon by the meansl shown in Fig. 4, the rim o'f the member 54 projects over the rim of the sleeve 53. The sleeve 55 is secured to the bolt 58 as by means shown in Fig. l to secure sleeve 'I to bolt.

20. 'I'his bolt is screw-threaded and engages the screw-threaded portion 58 of the extension 59 of the casing I. By turning the sleeve 55 the bolt pins 60 and 6I, for instance of hardened steel and so on. `The pins 60 and 6| abut on each other when the measurment is to be taken.

' The gauge is usedI as described with reference,

The spring tends to keep the feeler rod 3B inA engagement with the rod 2I. The pointer 63 shows-the resultautomatically on the dial 62. All the parts are arranged in a housing xed on the casing I. j i Y /As shown in Figs. 6 and 7 the adjusting gauge may be constructed to takeoutside measures of the workpiece. The casing I is provided withv an arm 4I extending sidewardlyfrom the casing I'. At the fr eeend ofthe arm 4I a gauging member 44 is adjustably arranged in a sleeve portion 42l of said arm by means of-a set screw 46 with headf4'. The head 4`I of the set screw 46 is closely-screwed on theupper face 45 of the said sleeve 42.'A Aln the casingl I gauging member 33 isslidably arranged in the boreV running co-r axially with the gauging member 44. The member 33-is securedagainst loss by the set screw `'l`5i 58 is displaced in axial direction. Both the rod y. 2 and the bolt 58 are provided respectively with 1. An adjustable gauge comprising in combination, a casing having an axial bore therein, a rod `slidable within said bore, said rod having a coni- ,cal inner end, an abutment at the opposite end thereof, axially spaced sets of guideways in said casing, each guideway extending radially relationA to indicate the position of said rod in'said bore.

2*.j Any adjustable gauge comprising in combination, a casing'havingV an axial borel therein, a

, rod slidable within-said bore, said rod having 31 engaging the groove 360i the gauge 33. The y latter rests on the slanting face 43 of the rod 2.. The Vboreis closed by the disk 38. To takeV a measurement `the rod 2 is Vwithdrawn by the handles 28 against the action of spring 22 andis then released when the gauging members'33, 44 are inproper position onthe Work piece. Any suitable' registering device may be used.

a conical inner end, an labutment at' the opposite end thereoicaxially spaced sets of guideways in said casing, each guideway extending radially relatively to said bore, a gauging member slidably-mounted in each of said guideways and engaging saidl rod on the conical surface adjacent its end, a spring acting` on said rodin a direction to force said gaugingmembers outwardly, and indicating means movable against'said abutment when -said rod is in gauging position toindicate the position of said rod in said b'ore.

3. An adjustable gauge comprising in combination, a casing having an axial bore therein, a

rod slidable within said bore, saidrod having a conical inner end,l an abutment atthe opposite f end thereof, axially'spaced lsets of guideways in said casing, each guid'evvayA extending radially relatively 'to said bore, a gauging member slidably mounted ineach` guideway and engaging said rod, the gauging members for the different c its end, aspring acting on 'said lrod in a direction to force lsaid gauging members 'radilly outward, and means movable against said abutment when saidirod is in gaugingposition to indicate bore;

the position of said rod in said l Y v v MAX MAAG. 

